diff -up procps-3.2.7/top.1.cpudesc procps-3.2.7/top.1
--- procps-3.2.7/top.1.cpudesc	2008-01-18 08:04:19.000000000 +0100
+++ procps-3.2.7/top.1	2008-01-18 08:15:49.000000000 +0100
@@ -540,6 +540,20 @@ You\fI move\fR a field to the\fB left\fR
 upper case\fR letter and to the\fB right\fR with the\fB lower case\fR
 letter.
 
+.\" ......................................................................
+.SS 2c. SUMMARY Area Fields
+.\" ----------------------------------------------------------------------
+The summary area fields describing CPU statistics are abbreviated.  They provide
+information about times spent in:
+  \fR  us = user mode
+  \fR  sy = system mode
+  \fR  ni = low priority user mode (nice)
+  \fR  id = idle task
+  \fR  wa = I/O waiting
+  \fR  hi = servicing IRQs
+  \fR  si = servicing soft IRQs
+  \fR  st = steal (time given to other DomU instances) 
+
 
 .\" ----------------------------------------------------------------------
 .SH 3. INTERACTIVE Commands
